async def coro1():
    print("C1:Start")
    print("C1:Stop")

async def coro2():
    print("C2:Start")
    print("C2:a")
    print("C2:b")
    print("C2:c")
    print("C2:Stop")

async def main():
    await c1
    

c1=coro1()
c2=coro2()
print(c1,c2)
